The first review sounds too much like manufacturers, have bought the part -schon the first attaching I stood in a cloud of dust "sucks 90% dust" ??, so other disc, again by reading the manual -Second attempt the same. So gypsum does not go !! or the house is empty and you do after a Kpl.Reinigung, my wife has been looking forward to. The engine speed / processing etc, are ok. Bosch should consider whether it does not ruin the product named "Ventario" was a flop Both parts were me "DIY Bauhaus" highly recommended by a Bosch employee / representative, I think for clean grinding works there are better producers. Incidentally, I have a sander PEX 270A Bosch -with suction hintendran, makes the job well, although he is micht suitable for drywall, lt.Hersteller